Wildfire Knowledge Graph · Fire Investigation
The heat, flame, spark, electrical fault, lightning discharge or other initiating energy source capable of starting combustion.
In plain language
The heat, flame, spark, electrical fault, lightning discharge or other initiating energy source capable of starting combustion.
Why it matters
Ignition Source is useful because it separates one specific part of wildfire behaviour, exposure, operations or evidence from nearby concepts that can otherwise be mixed together.
Ignition source: possible mechanism versus demonstrated evidence
An ignition source is the heat, spark, flame or other energy source that initiates combustion under the conditions of the fuel and environment. Examples of candidate mechanisms include lightning, hot particles, electrical faults and open flame, but merely identifying a candidate nearby does not establish cause.
Illustration: a utility line and a burned roadside may occur close together. Proximity alone does not prove electrical ignition; an investigation would need appropriate physical, electrical, witness and time-sequence evidence. The same caution applies to reports of machinery, campfires and lightning.
Distinguish fuel, oxidizer and ignition energy when describing a mechanism. A fuel may be dry and receptive without igniting unless sufficient energy and conditions are present. Conversely, ignition can occur in receptive material even when a broader regional fire-danger index is not at its maximum.
When publishing a case record, label the cause as official, suspected, unconfirmed or undetermined according to the available evidence, and link the precise agency finding rather than a third-party allegation.
Read Fire Cause, Cause Classification and methodology.